Maximilian Günther will present his paper titled Send and Pretend: Exploiting Transcript Consistency Issues in End-to-End Encrypted Group Chats at the 35th USENIX Security Symposium in Baltimore, MD, USA from August 12–14, 2026.
In this paper, the authors demonstrate that today’s major E2EE messengers do not guarantee any form of TC for group chats, allowing a malicious group member to selectively omit, reorder, or present altered content to different recipients without triggering warnings in their user interface.